[libcxx-commits] [libcxx] [libc++][test] Improve `fold_left` `check_lvalue_range` coverage. (PR #183990)

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c8ef wrote:

Hi @philnik777, when you have a moment, could you take a look at this patch? It should be fairly straightforward, so hopefully it won't take up too much of your time. Thanks!

https://github.com/llvm/llvm-project/pull/183990